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UNITED sTATEs PATENT oEEIoE.

LEWIS E. GLOW', OF MONTPELIER, VERMONT.

TWYER.

Specification of Letters Patent No. 3,277', dated September 23, 1843.

To all whom may concern Be it known that I, LEwIs E. CLow, of Montpelier, in the county of )Vashington and State of Vermont, have invented a new` and useful Improvement in Twyers; and I do hereby declare that the following is a full and exact description.

This twyer consists of a tube of suliicient dimensions at one end to receive the pipe the collar, and is used as an axle for the` air chest see Fig. V, letter c, in the drawings). Said tube is represented by Fig. I,

in the drawings. The bottom (see Fig. II, lett-er (l, in the drawings) part of the air chest. I usually make about twelve inches wide in a circular form, with a hole in the center to receive the small end of the pipe before mentioned, and a lanch (see Fig. II, letter e, in the drawings) on the outer edge about one inch wide, made a little flaring, so

as to receive the tianch of the top part of the air chest, thereby forming the sides of the air chest; and there ispanother flanch (see Fig. II, letter j, in the drawings) of the same width as the other, around the hole,

in the center, to serve as a box for that part of the pipe designed for an axle to the air chest.. Said bottom plate is represented by Fig. II, in the drawings. The top part of the air chest ismade in the same form as the bottom, with two tubes (see Figs. III, and V, letter g, in the drawings) `or orifices, raised about two inches, near the sides of the air chest, directly opposite, each to the other, and pointing, each toward the other,

in an angle of about `forty-tive degrees. I make these orifices about two by three inches at the lower end, and at the top, they are brought nearly to an edge where the air 1s to escape. The upper `side of said last mentioned tubes is cast separate, and is fastened to the top plate with a screw or bolt, so that-this part of the air chest, which is most exposed to the action ofthe hre, may be repaired with very little expense. Said top plate is represented by Fig. III, and said upper side of the air pipes by Fig. IV, in the drawings. The top and bottom plates are fastened together with screws or bolts, and cemented at the edges where the flanches come together; `and the several parts when united, are represented by Fig. V, in the drawings. The first mentioned tube is to be made stationary in the back of the forge, and the air chest is made to vrevolve horizontally around the small end of the stationary pipe, thereby enabling anyone totake a long or short welding hea-t at pleasure, that is by turning the air chest so that the air pipes point, one to, and the other from the back of the forge, a short `heat is obtainedyand by turning the air chest so that the air pipes point crosswise of the forge, a long heat is obtained; and the air being received in the center, a much more unbroken current of air is obtained than with the twyers now in use, and there is a great saving in coal, by using this twyer.

What I claim as my invention and desire to secure by Letters Patent is- The combination of the revolving twyer cap constructed as above describedlwith the central underblast arranged and constructed as above described.

y LEWIS E. GLOW.

Witnesses:

SAMUEL H. SMITH, SYLVANUS RIPLEY. 

